The brink of history and a calendar grand slam. He is into the final to play Daniil Medvedev.
Djokovic often loses the first set in finals and late rounds of Opens. However, he always appears to finish strongly with a 6-2 win in the fourth or fifth set.
"Twenty-seven down, one to go. Novak Djokovic is on the brink of becoming the first man since Rod Laver in 1969 to complete the calendar grand slam after defeating Alexander Zverev in five sets #USOpen"